I said this on the last article about this game, but seriously BUY. THIS. GAME. Beautiful and tear jerking story. $17.99 may be a bit too much for a 3 hour game that you will only play a couple times at max. But the experience of playing through it is sublime.

If you dig games like Dear Esther and want to support the devs then I would say for sure buy it. If you can hold off though (or are low on cash) it may be cheaper during the Steam Winter sale which will be coming up. I bought it day one and don't regret the purchase one bit, amazing experience. Giantbomb has a nice write up for a review without spoilers.